test: add utility process mocha runner to run net module tests

spec/api-utility-process-spec.ts

@@ -435,4 +435,11 @@ describe('utilityProcess module', () => {
       await exit;
     });
   });
+
+  it('should pass the api-net-spec tests', async () => {
+    const child = utilityProcess.fork(path.join(fixturesPath, 'mocha.js'));
+    child.postMessage('spec/api-net-spec.ts');
+    const [code] = await once(child, 'exit');
+    expect(code).to.equal(0);
+  });
 });

spec/fixtures/api/utility-process/mocha.js

@@ -0,0 +1,61 @@
+const path = require('node:path');
+const v8 = require('node:v8');
+
+require('ts-node/register');
+
+v8.setFlagsFromString('--expose_gc');
+
+const Mocha = require('mocha');
+const mochaOptions = {
+  forbidOnly: process.env.CI
+};
+if (process.env.CI) {
+  mochaOptions.retries = 3;
+}
+if (process.env.MOCHA_REPORTER) {
+  mochaOptions.reporter = process.env.MOCHA_REPORTER;
+}
+if (process.env.MOCHA_MULTI_REPORTERS) {
+  mochaOptions.reporterOptions = {
+    reporterEnabled: process.env.MOCHA_MULTI_REPORTERS
+  };
+}
+const mocha = new Mocha(mochaOptions);
+
+const { runCleanupFunctions } = require('../../../lib/spec-helpers');
+mocha.suite.on('suite', function attach (suite) {
+  suite.afterEach('cleanup', runCleanupFunctions);
+  suite.on('suite', attach);
+});
+
+if (!process.env.MOCHA_REPORTER) {
+  mocha.ui('bdd').reporter('tap');
+}
+
+const mochaTimeout = process.env.MOCHA_TIMEOUT || 30000;
+mocha.timeout(mochaTimeout);
+
+const baseElectronDir = path.resolve(__dirname, '../../../..');
+
+process.parentPort.on('message', (e) => {
+  console.log('child received', e);
+  console.log('path', path.join(baseElectronDir, e.data));
+
+  mocha.addFile(path.join(baseElectronDir, e.data));
+
+  // Set up chai in the correct order
+  const chai = require('chai');
+  chai.use(require('chai-as-promised'));
+  chai.use(require('dirty-chai'));
+
+  // Show full object diff
+  // https://github.com/chaijs/chai/issues/469
+  chai.config.truncateThreshold = 0;
+
+  mocha.run((failures) => {
+    // Ensure the callback is called after runner is defined
+    process.nextTick(() => {
+      process.exit(failures);
+    });
+  });
+});